MAL-2026-12050

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-sme.reporting.reporting/MAL-2026-12050.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12050
Published
2026-08-05T01:01:15Z
Modified
2026-08-05T01:49:55.889805216Z
Summary
Malicious code in tinkoff-statist-browser-typed-client-sme.reporting.reporting (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (eb2aa808aabae01f3ce4f8ed4a73077d3adffbbcdc1af80af27d6cc9de628d0e)

On require() of the package, index.js loads vendor.js which selects a platform-specific endpoint and fetches a binary payload from one of four Cloudflare Workers hosts whose names are assembled at runtime via string split/join concatenation (oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev), with DNS TXT-record fallback discovery via tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The fetched bytes are written to a randomized temp path with disguised names (.cache<hex>, dotnetdiag<hex>.exe), chmod 0755 on POSIX, and executed detached via spawn("/bin/sh", ["-c", fp + " &"]) or spawn("cmd",...) on Windows. Hostnames and sensitive API names (child_process, chmodSync) are reconstructed from array joins to defeat static matching; a 22822-second cooldown flag suppresses re-execution. The package name imitates an internal Tinkoff scope while lib/telemetry.js is unused cover-story code. Installing or requiring this package executes attacker-controlled native code on the host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T01:01:15Z",
            "sha256": "eb2aa808aabae01f3ce4f8ed4a73077d3adffbbcdc1af80af27d6cc9de628d0e",
            "id": "IN-MAL-2026-011480",
            "versions": [
                "20.5.4"
            ],
            "import_time": "2026-08-05T01:39:30.855155352Z"
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-statist-browser-typed-client-sme.reporting.reporting

Package

Name
tinkoff-statist-browser-typed-client-sme.reporting.reporting
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-statist-browser-typed-client-sme.reporting.reporting

Affected ranges

Affected versions

20.*
20.5.4

Database specific

cwes 
[
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-cEHLVxWm3l5qfSMwYTU8ux7oxSZ0FXSvYX/P5gmGgEEWN54rbpZ+mXRh64q3sI1KmlAlzSDN5sF7nxJpsHaVug==",
                "sha1": "251e7b33d32b724a53d499e3de48bb5a4713d493"
            },
            "filename": "tinkoff-statist-browser-typed-client-sme.reporting.reporting-20.5.4.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_vendor.js",
            "sha256": "6dbdd78d9a2088be564fec3e5ef3460160d81f5a65e933846c7747c8f3736192",
            "tlsh": "f8a1879a15aa701d8bb0dbe58717481af65af6533380c2d4f79ca9944fb312482b1efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-sme.reporting.reporting/MAL-2026-12050.json"